Rod ABC has a diameter of 30 mm at AB and diameter of 20 mm at BC. the whole rod is subjected to a tension load of 40 KN. Calculate the elongation of the whole rod. ( hooke’s Law applies) stress/strain diagram attached

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Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.